20038518432 has 144 divisors (see below), whose sum is σ = 59618063232. Its totient is φ = 6377763840.

The previous prime is 20038518431. The next prime is 20038518457. The reversal of 20038518432 is 23481583002.

20038518432 is a `hidden beast` number, since 200 + 3 + 8 + 5 + 18 + 432 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20038518431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 536923 + ... + 573029.

It is an arithmetic number, because the mean of its divisors is an integer number (414014328).

Almost surely, 2^20038518432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20038518432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29809031616).

20038518432 is an abundant number, since it is smaller than the sum of its proper divisors (39579544800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20038518432 is a wasteful number, since it uses less digits than its factorization.

20038518432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36211 (or 36200 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 20038518432 in words is "twenty billion, thirty-eight million, five hundred eighteen thousand, four hundred thirty-two".